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Microchip Technology 24LC08BT-E/OT
- Part No.:
- 24LC08BT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC08BT-E/OT.pdf
- Description:
- IC EEPROM 8KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,708
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Product details
Overview
24LC08BT-E/OT from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 5 ms max page write time, and hardware write-protection via the WP pin. It supports industrial (–40°C to +85°C) and extended (–40°C to +125°C) temperature ranges in SOT-23-5 package and is used for configuration storage in embedded controllers and sensor modules.
For engineers reviewing the 24LC08BT-E/OT datasheet, 24LC08BT-E/OT pinout, 24LC08BT-E/OT application, or 24LC08BT-E/OT equivalent, key selection criteria include VCC range (2.5–5.5V), I²C timing compliance at 400 kHz, WP-enabled hardware protection, 16-byte page buffer capability, and SOT-23-5 footprint compatibility with space-constrained PCB layouts.
Technical Context
The 24LC08BT-E/OT implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes a 16-byte page latch, address pointer, and HV generator for EEPROM programming, enabling self-timed erase/write cycles without external timing components.
It supports three read modes-current address, random, and sequential-and uses acknowledge polling to detect write completion. The device requires no external pull-up resistors on A0–A2 (unconnected), while SDA and SCL require external pull-ups (2 kΩ typical for 400 kHz operation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four 256-word blocks for segmented access control |
| VCC Range | 2.5V to 5.5V - ensures compatibility with 3.3V and 5V logic systems; excludes sub-2.5V operation unlike 24AA08/24FC08 |
| Max Clock Frequency | 400 kHz - defines maximum I²C bus speed; requires 2 kΩ pull-up for reliable timing at full rate |
| Page Write Buffer | 16 bytes - enables burst writes within a single physical page (0–15, 16–31, etc.), reducing transaction overhead |
| Write Cycle Time | 5 ms maximum - determines minimum interval between write commands; impacts firmware timeout design |
| Endurance & Retention | 1 million erase/write cycles and >200 years data retention - validates long-term reliability in infrequently updated config storage |
| ESD Protection | >4,000 V HBM - provides robustness against handling-induced transients in manufacturing and field service |
Pinout & Package
24LC08BT-E/OT is supplied in a 5-lead SOT-23 package (JEDEC MO-178AA), with exposed pad not present and pin 1 marked by beveled corner. Pin functions are validated per Microchip DS20001710M, Table 2-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock Input | Asynchronous master-generated clock synchronizing all I²C transfers; must be pulled high externally |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O; connects to system GND plane for noise immunity |
| SDA | Bidirectional Data I/O | Open-drain node requiring external pull-up; carries addresses, data, and ACK/NACK signals |
| VCC | Power Supply | Single supply input (2.5–5.5V); powers EEPROM array, logic, and charge pump; bypass capacitor required |
| WP | Hardware Write-Protect | Logic-high disables all write operations (000–3FF); tied to VSS for normal operation; no function in CSP variants |
Key Features
| Feature | Design Value |
|---|---|
| Low-Power Operation | 1 µA max standby current (I-temp.) enables battery-backed retention in always-on systems |
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications, including START/STOP detection and ACK protocol |
| Noise Immunity | Schmitt-trigger inputs and 50 ns input filter on SDA/SCL reject EMI spikes common in motor-driven or switching-power environments |
| Page Write Efficiency | 16-byte buffer reduces host CPU intervention and bus occupancy versus byte-write-only EEPROMs |
| Hardware Security | WP pin provides tamper-resistant write inhibition without firmware involvement-critical for calibration or security keys |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization; retains values across cold starts and brownouts. Use Value: Eliminates need for external calibration hardware; enables field recalibration via I²C without firmware update or reprogramming tools. | Use Scenario: Holding boot-time parameters (baud rate, network ID, GPIO defaults) for microcontrollers in HVAC control boards. IC Role / Device Role / Timing Role: I²C slave providing persistent settings to MCU during reset sequence; accessed before real-time tasks begin. Use Value: Reduces BOM count by replacing OTP fuses or flash-based config storage; supports dynamic parameter updates over service port. |
| Medical Device Settings Backup | Automotive Body Control Module |
Use Scenario: Saving user-adjusted therapy parameters (e.g., pressure thresholds, alarm limits) in portable respiratory devices. IC Role / Device Role / Timing Role: Low-power EEPROM retaining critical settings during battery replacement or deep-sleep mode. Use Value: Meets IEC 62304 safety requirements for nonvolatile data integrity; 1M-cycle endurance supports lifetime device usage. | Use Scenario: Storing door lock actuator calibration data and seat position memory in 12V automotive body ECUs. IC Role / Device Role / Timing Role: AEC-Q100 qualified I²C EEPROM interfacing directly with CAN gateway MCU over isolated bus. Use Value: Extended temperature rating (–40°C to +125°C) ensures operation under hood conditions; WP pin prevents accidental overwrites during CAN firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA08T-I/OT | Wider VCC range (1.7–5.5V); supports 100 kHz below 2.5V; same 8Kbit density and SOT-23-5 package | Enables direct replacement in 1.8V/2.5V systems where 24LC08BT-E/OT cannot operate | Select when low-voltage operation (<2.5V) is required; verify I²C timing margins at reduced VCC |
| AT24C08D-SSHM-T | Same 8Kbit size, 2.5–5.5V range, and 400 kHz speed; but uses 8-lead SOIC package and lacks WP pin | Requires PCB layout change; no hardware write protection-relies on software locking or bus arbitration | Choose only if SOIC footprint is available and WP functionality is unnecessary or implemented externally |
Compared with 24LC08BT-E/OT, the 24AA08T-I/OT extends voltage flexibility at the cost of reduced max clock speed below 2.5V, while the AT24C08D-SSHM-T sacrifices WP functionality and package compatibility for Atmel's endurance profile and qualification pedigree.
Availability
24LC08BT-E/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and automotive body control module designs requiring stable component supply, extended temperature performance, and hardware write protection.
Supply support for 24LC08BT-E/OT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and memory solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.
The 24LC08B family delivers cost-optimized, I²C-compatible EEPROMs targeting space- and power-constrained embedded systems needing reliable, low-pin-count nonvolatile storage with hardware security.
FAQ
What is the minimum VCC required for reliable operation of the 24LC08BT-E/OT?
The 24LC08BT-E/OT requires a minimum VCC of 2.5V for guaranteed operation across its full temperature range (–40°C to +125°C). Unlike the 24AA08 variant, it does not support operation below 2.5V-even at room temperature-due to internal charge pump and logic threshold design. Operating below 2.5V may result in incomplete writes or communication failure.
Does the 24LC08BT-E/OT support 1 MHz I²C clock frequency?
No, the 24LC08BT-E/OT does not support 1 MHz I²C operation. Its maximum clock frequency is 400 kHz, as specified in the Device Selection Table and confirmed in Section 1.0 Electrical Characteristics. Only the 24FC08 variant in the same family supports 1 MHz; using 24LC08BT-E/OT at higher frequencies violates AC timing parameters and risks data corruption.
How is write protection implemented on the 24LC08BT-E/OT?
Write protection on the 24LC08BT-E/OT is implemented via the WP (Write-Protect) pin: when tied to VCC, all memory locations (000–3FF hex) become read-only; when tied to VSS (or left floating, though not recommended), full read/write access is enabled. This hardware-level lock operates independently of I²C commands and remains active during power cycling.
What is the physical page size and boundary alignment requirement for page writes on the 24LC08BT-E/OT?
The 24LC08BT-E/OT has a 16-byte physical page size, with boundaries aligned to integer multiples of 16 (e.g., 0x00–0x0F, 0x10–0x1F). Page writes crossing a boundary wrap around within the current page instead of advancing to the next-so writing 16 bytes starting at address 0x0F will overwrite bytes 0x0F through 0x1E, not 0x0F through 0x1E across pages. Firmware must enforce alignment.
Is the 24LC08BT-E/OT AEC-Q100 qualified, and what grade does it meet?
Yes, the 24LC08BT-E/OT is AEC-Q100 qualified and rated for Grade 1 (–40°C to +125°C), matching its extended temperature specification. This qualification covers stress testing for automotive environments including thermal cycling, humidity bias, and ESD-making it suitable for body control, lighting, and comfort systems outside the engine compartment.
24LC08BT-E/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 256 x 8 x 4
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24LC08BT-E/OT FAQ
1.How can I place an order for 24LC08BT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BT-E/OT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 24LC08BT-E/OT reliable?
The price and inventory of 24LC08BT-E/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC08BT-E/OT is usually 5 days.
3.What payment methods are accepted for 24LC08BT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BT-E/OT?
24LC08BT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BT-E/OT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 24LC08BT-E/OT?
For technical support, including 24LC08BT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BT-E/OT requirements.
6.How does Aetrix verify that 24LC08BT-E/OT is sourced from the original manufacturer or authorized distributors?
All 24LC08BT-E/OT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 24LC08BT-E/OT meets industry standards.
7.What is the process for return or replacement of 24LC08BT-E/OT?
All 24LC08BT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BT-E/OT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 24LC08BT-E/OT part is unused and in its original packaging.
Return procedure for 24LC08BT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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